/Engine/Plugins/Experimental/GeometryScripting/Source/GeometryScriptingCore/Public/GeometryScript/PolygonFunctions.h
Returns a specified Simple Polygon from a Polygon List  either the outer polygon, if HoleIndex is -1, or specified inner hole. Polygon will be empty for invalid Polygon or Hole indices.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="GeometryScript|PolygonList", Meta=(ScriptMethod)) static [FGeometryScriptSimplePolygon](API\Plugins\GeometryScriptingCore\GeometryScript\FGeometryScriptSimplePolygon) GetSimplePolygon ( [FGeometryScriptGeneralPolygonList](API\Plugins\GeometryScriptingCore\GeometryScript\FGeometryScriptG-) PolygonList, bool & bValidIndices, int32 PolygonIndex, int32 HoleIndex )